<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>阴影</title>
		<style>
			div{
				width: 100px;
				height: 100px;
				border: 1px solid red;
				border-radius: 8px;
				margin: 20px;
				/* box-shadow: -20px -10px 10px #00FFFF; */
				/* box-shadow: 0px 0px 20px #0000FF ; */
				box-shadow: inset 3px 3px 10px #63A7D6;
			}
		</style>
	</head>
	<body>
		<div></div>
	</body>
</html>
